Steam gasification and combustion kinetics of gingko nut shell in a thermobalance reactor

Pyrolysis kinetics of a gingko nut shell in a thermo gravimetric analyzer (TGA) and the steam gasification and combustion kinetics of chars from gingko nut shell in a thermobalance reactor have been determined. The effects of the reaction temperature (350°C - 950°C) and steam partial pressure (0.4 - 0.8 atm.) on the gasification kinetics and that of oxygen partial pressure (0.4 - 0.8 atm.) on the combustion kinetics have been determined in a thermobalance reactor. The activation energy and the pre-exponential factor were determined from the Arrhenius plot based on the shrinking core model. In the steam gasification reaction, the activation energy and the pre-exponential factor are found to be 40.8 kJ mol-1 at 1.7 s-1 atm.-1, respectively. The reaction order is found to be 0.32 with respect to water partial pressure at 750°C. In the combustion reaction, the activation energies and pre-exponential factors are found to be 92.8 kJmol-1 at 136.8 s-1atm-1 and 9.2 kJmol-1 at 0.012 s -1atm-1 in the reaction control and the pore-diffusion control regimes, respectively.
Publisher
ELSEVIER
Issue Date
2006
Language
ENG
Citation

STUDIES IN SURFACE SCIENCE AND CATALYSIS, v.159, pp.569 - 572

ISSN
0167-2991
URI
http://hdl.handle.net/10203/3985
Appears in Collection
CBE-Journal Papers(저널논문)
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